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New Rev 4 Board |
A newer version (Rev 4) of
this circuit board is available. Rev 4 includes a faster CPU,
more memory, more I/O and an optional LCD. We recommend you use
Rev 4 for new projects. Even though this older board is no longer
available, we are keeping these old pages on-line for reference
to assist people who purchased or build the older version.
PC Board Artwork
Here is the artwork required to etch the printed circuit board.
You can buy bare boards, but if you
like etching circuit boards, here are the high resolution images
you will need. The good news is that board uses a modest number
of vias, and has 15 mil (0.38 mm) traces, with 10 mil (0.25 mm)
spacing. The not-so-good news is that
many wires connect on the component side, and the ICs are close
enough together that it is very difficult to solder the top
layer with a socket... even the machined pin type which has
exposed metal, because the nearby socket is very close. If
you build this board using a home-etch process (no plated through
holes), it will be difficult to use sockets for all of the chips.
This design and its printed circuit board layout have been placed in the public domain. They are distributed in the hope that they
will be useful, but are provided without any warranty, not even a warranty of merchantability
or fitness for a particular purpose.
Solder Side Artwork
Also available on-line as a
600 DPI
image. Right click for download menu.
Component Side Artwork
Also available on-line as a
600 DPI
image. Right click for download menu.
Silk Screen Artwork
Also available on-line as a
600 DPI
image. Right click for download menu.
For the highest quality results, use these
Postscript Files, on a 1200 dpi
postscript printer. With a postscript rendering package, such as
ghostscript,
you can render these postscript files into bitmaps and data streams
for non-postscript printers. The images on this page were produced
by rendering these postscript files with ghostscript, and then some
cropping and scaling (for the 120 dpi previews w/ grayscale) using the
Gimp. Both of these programs are
free (GPL) and come pre-installed with RedHat Linux.
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